Elevator driving-gearing.



E. L. DUNN.

ELEVATOR DRIVING GEARINGP APPLICATION FILED N0v.17. I909.

Patented Aug; 17, 1915.

2 SHEETS-SHEET COLUMBIA FLANOGRAPH COUWASHINUTONY D e.

E. L. DUNN.

ELEVATOR DRIVING GEARING.

APPLICATION FILED NOV. 11. 1909.

Patented Aug. 17, 1915.

2 SHEETS-SHEET 2.

COLQMBIA PLANOGRAPH C0.,WASHINGTON. D. c.

EDWARD L. DUNN, or wcncnsrnn, rrassncnusnrrs, ASSIGNOR, BY nEsNnAssIGN- MENTS, TO STANDARD PLUNGERELEV CHUSET'I'S, A CORPORATION OF MASSACHUSETTS.

ATOB, COMPANY, OF WORCESTER, IIIASSA- ELEVATOR DBIVING-GEARING.

mechanism for gear driven machines whereby reduction gears may be used between the motor or driving meansand the winding drums, as in cases where it is desired to temporarily increase the power of the ma chine lfor the purpose-0f moving unusual loads. p

In electric elevators especially, where the machine-is driven by an electric motor, and a-bralre operating on the shaft is used for holding it stationary when "the motor is not energized, considerable danger has heretofore arisen where it has beensought to use reductiongears to hoist heavy'loads by rea-' son of the fact that inchanging the connection from'the ordinary direct connection to the reduction gears,'the brake portion of 'the shaft has been disconnected from the driving or Worm shaft which drives the winding drum or drums, thereby rendering the. brake ineffective to hold the machine when the current is off. In worm driven machines, for instance, where the pitch of theworms is high, the worm shaft may be driven backward'by a winding drum and the load, with nothing to hold it when the brake portion of the shaft is disconnected.

It, is the object of this invention to provide reduction gears whereby the brake will at all times be connected to the driving shaft, irrespective of the gear ratio between the motor and the driving shaft.

According to the specific embodiment of the invention illustrated herein, 1 have provided in combination with a worm driven winding machine directly connected to a Specification of Letters Patent.

Patented An 17, 1915.

Application filed November 17, 1909. Serial No. 528,482.

particularly reduced, whereby to enable heavy loads to be moved without endangermg the safety ofthe apparatus or permit-- ting the brake to become ineffective to hold the winding drum.

The invention will be more fully understoodjin connection with the description of the embodiment thereof. shown in the ac companyingdrawings, wherein Figure 1 is a view in elevation of a winding machine embodying the invention; Fig. 2 is a section showing a-form of planetary variable speed gears; Fig. 3 is a section on the line 3-3 of Fig. 2, showing the parts in position for reducing the gear ratio; and Fig. t shows the parts-in normal position for securing a 1 to 1 ratio between the motor shaft and the driven shaft.

1 represents a base upon which is mounted a motor 2, having a motor shaft 3 at one end of which is a brake mechanism 4, consistlng of a series of non-rotatable disks carried by a casing 5, alternating with a series of rotatable disks carried by the shaft 3, and normally pressed together by a spring, as 6, acting on an armature 7 which is controlled by a solenoid winding 8 in the motor circuit. Nhen the. motor circuit is closed the magnet 8 upon becoming energized withdraws the armature 7 and compresses the spring 6, thereby releasing the brake. V

Referring to Fig. 3, keyed to the end of the motor shaft 3 is a pinion 10 which meshes with planet pinions 11, 11, 11, carried by a coupling 12, kcyed to the end of the driving shaft 13. This shaft 13 as herein specifically shown carries opposite worms 1%, 15, respectively meshingwith gears 16,

drums 18, 19 on shaftsQO, '21, having supporting bearings on the base 1. It will be understood, however, that the invention is not limited to this particular arrangement of Winding drums or ropes, as one or more winding drums may be used according to the particular design of machine. The arrangement herein shown is a balanced system, wherein the rope 22 passes around a deflecting drum (not shown), together with the two winding drums 18, 19, one end of the rope carrying the carand the other a counter-Weight, and embodied in a machine 17, which gears drive respectively winding ,of'the traction type wherein the motor and. the winding drums are mounted at the top. of the-hatchway. I

1 Meshing With the planet pinions 11, is an internalgear 23, carried by a plate 24 which "is mounted on a bearing sleeve 25 to rotate on the shaft 3. At one end ofrthe internal gear 23 is the coupling 12, heretofore descr bed askeyedto the shaft 13, and at the;

other side is a stationary standard 26 adapt- I ed to be bolted to the base 1, and having a f hole through which passes the hub of the plate 24:. Mounted'in' the gear body 23 are =on'eor1nore studs 27 provided with shoulders 28. The studs are threaded at each end and are of such length that they can be bolted to connect the gear 23 either to the coupling 12, as in Fig. 4?, or to the standard 26, as shown'ln Fig; 3. \Vhen the gear 23 is locked to the coupling12, as shown in Fig. i, by means ofthe stud or'studs 27,

when. the ,shaft3 revolves, the coupling 12 andthe shaft 13 will be revolved at the same ratio, but when the stud or studs 27 are shifted to the'position shown in Fig. 3, it will be seenthat the internal gear 23 will be locked to 'thestandard 26, and held from rotation. Consequently, when the pinion 10 revolves it carries the three pinions 11 around the now stationary internal gear 23.

TJitlithe pinionsll goes the coupling 12,

and thereby the shaft 13 isdriven at a lower speed. As herein shown the ratio is l to '1, that is, the shaft 3 will make four revolu- V tions to one of the shaft 13, but of course this ratio can be" varied by differently proportioning the pinions. Also, it will be seen thata step-up gearingwill be provided in case the parts are reversed, making theshaft 13L-the motor shaft and the shaft 3 the driving shaft. V

' From the foregoing description it will be seen that the brake and the driving shaft will always be positively connected irrespective of the position of the studs, and

thereby'the brake is always effective upon the winding drum; The studs are so constructed that they cannot be removed from between the standard 26 and the coupling 12', nor can the standard 26 be removed, even though it is unbolted from the base. This is an important feature, since if the studs i i could be removed there would be no assurance of safety, and the connection between the driving shaft and the motor shaft might be broken by'carelessness' of the workmen.

' The studs are simply shifted by'removing the nuts and pushing them back in one or the other direction until they come through,

and it will be seen that as soon as one stud is shifted in this manner the parts will be locked. For instance, by shifting the position of one stud shown in Fig. 4; to the position'shown in Fig. 3 the internal gear 23 is locked to the standard 26, so that it is not rupted. 1

disconnectionat any time'of the driving possible tobreakthe connectionb'y failing f to shift all the studs, noristhere any point I at which the permanent connection is inter A further, advantageof the invention is that the gearing is always in'm'esh, whether I it is being used or not. Atleast three gears are engaged at the same time, and consequently the gears can be much smaller'than they otherwise could if dependence were had upon the engagement-of one pair-ofgears. It has heretofore been proposed to use ordinary back-gearingsuch as is used-in lathesf,

for reduction gearing in elevator machines, but such gearing has proven 'dangerous for so I use'beca'use it'has to be'set'up in a special .7

removable bearingwhen it i's-to be; used, and

in doing this it is necessary tof uncouplejthe driving shaft from the-motor shaft in order to install the reduction'gearingl Then after teeth, such "teeth have to be; of heavier de;

sign thanthat-disclosed-in;thisapplication]; 7 T

in the construction abovedescribed without, departing from the scope of the invention.) Having thus-described my invention, 1 j declare that what I claim as new andfdesire to secure byLetters Patent isjz Modifications; and changes may" be made 1. The combination 'o'f a- "driving and a. driven shaft, an internal gear, intermediate 85, I this is put in it will-beseen-.thatby'reasonf of the strain all "comlngon two palrs ofefl pinion's'and a' driving pinion, andmeans for alternatively locklng the internal gear to the If driven shaft :or holding the internal gear; stationary, said locking means beingpermanently connected {with said 7 internal gear and adapted to lock either the driven shaft and said internal gear'or afixed abutment and said internal gear, andan abutment.-

2. The combination of a driving shaft, a

driven shaft, a planetarygear connection between said shafts adapted to vary the direct speed ratio between said shaftsincluding shift'able means "preventing*complete connection between said shafts. V w l 3. The combination of a drivingshaft, a driven shaft, longitudinally shiftable means and gears for couplingsaidshafts torotate atthe same speed, or. at adilfeTerit-speed,

said coupling means at all times jmaintain l ing gearing between said shafts, 'and'a shiftan element of said gearing and said abutment to effect a geared driving connection between said shafts, said coupling being at all times engaged either with said abutment and said element of the gearing, or with a plurality of elements of the gearing.

6. The combination of a driving shaft, a driven shaft, planetary gearing between said shafts, a shiftable stud for locking part of said planetary gearing to said driving shaft in one position, and a stationary abutment engaged by said stud in another position to lock-a part of said gearing against rotation.

7, The combination of a driving shaft, a driven shaft, planetary gearing between said shafts, a longitudinally shiftable stud for locking part of'said planetary gearing directly to said driving shaft, said stud being shiftable to lock a part of said planetary gearing against rotation, and being permanently carried by one element of said planetary gearing.

8. In elevator reduction gearing, a base, driving and motor shafts, reduction gearing between said shafts, locking means permanently carried by said reduction gearing and adapted to lock part of said gearing to the Copies of this patent may be obtained for five cents each, by addressing the driving shaft or to the base according to the speed ratio to be secured between said shafts.

9. The combination of a shaft, an internal gear loosely and a pinion rigidly carried thereby, a second shaft, a planet pinion interposed between said internal gear and said first pinion, an abutment adjacent said internal gear, and a stud carried by said internal gear and longitudinally shiftable to engage it with said abutment or with said second shaft.

10. The combination of a shaft, an internal gear loosely mounted adjacent the end thereof, a pinion rigidly mounted at the end of said shaft, a second shaft, a collar rigidly carried at the end thereof, a planet pinion journaled on said collar and meshing with said first pinion and said internal gear, a stationary abutment adjacent said internal gear, and a stud shiftable to connect said internal gear and said abutment or said internal gear and said collar.

In testimony whereof I aflix my signature, in presence of two witnesses.

EDWVARD L. DUNN.

Witnesses:

J. ELMER HALL, ALFRED H. SAMsoN.

Commissioner of Patents Washington, D. G. 

